Carbureting apparatus



Dec. 29, 1931. 5, CUSHMAN I 1,838,365

CARBURETING APPARATUS Filed July 24 1924 2 Sheets-Sheet 1 INVENTOR. QM/ 7 6a @677717602 A TTORNE Y.

Dec. 29, 1931. E. B. CUSHMAN CARBURETING APPARATUS 2 Sheets-Sheet 2 Filed July 24, 1924 Patented Dec. 29, 1931 EVERETT 'B. cusmvmnt; or L nsinG.tiicrrreiimnssrenon, when. reexamine,

DELAWARE m Application filed July 24, sea 9,727,862, I V

This invention relates to the reservoiring of fuel oil and carburetion of air in connect-ion with internal combustion engines. t is especially designed for stationary engines, but might be used bile engine, v

It is the object of the invention to lift the fuel oil from a comparatively lower level to the cylinder ports by means of the engine it suction, without the intervention of special vacuum apparatus, which is relatively costly,

complicated and liable to get out of repair. The apparatus is so designed that the raw fuel is lifted only a small distance; it is then aspirated and mixed with a small quantity of air in such a rich state as to be non-combustible. It is then lifted in an atomized condition to the level of the cylinder ports and there mixed with the proper amount of air to be combustible.

Referring to the drawings:

Fig. 1 is a side elevation of an engine provided with the usual manifolds, spark plugs, wiring and other accessories and parts, which are obvious'from an inspection of the drawings. A liquid fuel reservoir is here shown as formed in the standa upon which the motor is supported. This is a conven- 3%; ient form for a power unit which is stationary; however, the reservoir might be at any low point. Supported on this stand is a fixture b in the nature of a carburetor, but so carbureting the air as to make it non comn) bustible due to the large excess of hydro-carbon over'the air as compared with'a normal combustible mixture. This fixture is provided with a Venturi, a nozzle d, needle control valve 6, valve. controlled air intake f.

'13 Preferably this air intake is connected by a pipe h with air intake 9 of the upper fixture,

later to be described. This permits the use of a single air filtering device where this is desired. The Venturi tube 0 is connected by 5 a risertube i with the upper fixture j which with a boat or automo-' cnnnunnrmelnrrani 'rusj f is a-casting and in which is located the throttle valve la which is here shown as con trolled by agovernor roller m, as is common in stationary engine practice, but obviously might be controlledinany other suitable way},

as handf n isa priming cup,-'while deslg nates alspr'ing closed supplemental -air p rt; m YTLJ'J .i iw Of: course, it is notynew tofhavethe spring controlled-supple1nental= ai'r portswhichio'p'en at "a high engine suction forthe purpose of diluting the chargeybut: in most carburetors where such supplemental air valves are sed; they are simply: used to 'fi'irther 'dilute' an already combustible mixture at high j-engine speedsi: .1 2: Here the purpose of l the supple mental air intake 5 is to get a final I correct air and oil proportion to the mixture at sub stantially the level a at "which the 'samefis used,

While the aspirating air whichfis taken in at relatively much lower level is used pri-' marily for the purpose of, forming a} light vehicle. which 'can-i serve a to lift the fuel oi-l to a} relatively :inuch higher level by the aid only of the engine suction from the carburetingrapparatus; -5 i i v what I term, afoot: valve on the botto'm of the pipe or conduit which leadstothe bottomi'of the fueltank and ;carries f the fuel oil to the} nozzlez: This valve "obviously maintains a, column fuel oil :at all times :within the pipe regardlesso'f the. level. of;- the "liquid in the; tank, resulting in isubstantialiunifornra ityfof performance at: all-times regardlesslof 11 6Y l 2 6 fuel oilxinthetankd l; ,2 .1 a @arbu 'eting and-fuel .OiLlifting: a 1.. @1 8: f internal; combustien; engines ranged o. njnectg an, oil fI'e e f'- WOl 'jj'l lthi: thBi mak P tts l g e ns nei QY lQ eI QthQQQI l-u hin er-.1- b (a feel. 9 res rvo r, e a erms a in et e r t twinge-s ngles adult. c nnectlq l fie Sa e. in ertion iendaprovidedi batten-Fewest snapper ixturelpca ecl near? the level of the cylinder ports for providing additional air to convert the practically noncombustible mixture furnished by the lower fixture into a combustible mixture, a fuel supply conduit and an air supply conduit connecting the two fixtures, suction means operating to lift the fuel oil to the level of the fuel nozzle in its raw state and operating to lift the atomizing fuel oil and aspirating air from the lower fixture to the level of the higher fixture, the said upper fixture provided with a throttle valve to control the gases passing into the engine and with a suction controlled valve for governing the admission of additional air to make the lifted noncombustible mixture, combustible for use in the engine.

2 In a carbureting and fuel oil lifting apparatus for internal combustion engines arranged to connect an oil reservoir with the intake ports of the engine cylinders, the combination with a fuel oil reservoir, of a lower fixture having a conduit having an inlet opening near the bottom of said reservoir and provided with a fuel oil nozzle and an aspirating airinlet to afford a relatively rich mixture which is practically non-combustible, the said fixture being located near the level of said reservoir, an upper fixture located near the level of the cylinder ports for providing additional air to convert the practically non-combustible mixture furnished by the lower fixture into a combustible mixture, an up-going conduit connecting the two said fixtures for carrying upwardly the non-combustible mixture, and a down-going conduit connecting the two fixtures for carrying air taken into the upward fixture to the lower fixture to afford the aspiratingmedium.

3. In a carbureting and fuel oil lifting ap-V paratus for internal combustion engines of the type adapted to lift liquid fuel in a noncombustible state to-a certain point before changing the same to a combustible fuel, the combination with aifuel oil reservoir, of an integral lower fixture positioned adjacent said oil reservoir, and an upper integral fix ture located adjacent the cylinder ports of the internal combustion engine, a single conduit of relatively large diameter extending from said lower fixture to'a point adjacent the bottom of said fuel reservoir, a foot valve connected to the end of said single conduit for maintaining a substantially constant 7 level of fuel in said conduit, a single conduit trolled air valve to govern the introduction of air necessary-to produce proper combus-. tion, an aspirating air inlet and a fuel oil signature.

EVERETT B. CUSHMAN. 

